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.TH sasl_server_start 3 "10 July 2001" SASL "SASL man pages"
.SH NAME
sasl_server_start \- Begin an authentication negotiation


.SH SYNOPSIS
.nf
.B #include <sasl/sasl.h>
.sp
.BI "int sasl_server_start(sasl_conn_t * " conn ", "
.BI "		           const char * " mech ", "
.BI "		           const char * " clientin ", "
.BI "		           unsigned " clientinlen ", "
.BI "		           const char ** " serverout ", "
.BI "		           unsigned * " serveroutlen ");"
.fi
.SH DESCRIPTION

.B sasl_server_start()
begins the authentication with the mechanism specified with mech. This
fails if the mechanism is not supported. SASL_OK is returned if the
authentication is complete and the user is
authenticated. SASL_CONTINUE is returned if one or more steps are
still required in the authentication. All other return values indicate
failure.

.PP
.I conn
is the SASL context for this connection
.PP
.I mech
is the mechanism name that the client requested
.PP
.I clientin
is the client initial response, NULL if the protocol lacks support for
client-send-first or if the other end did not have an initial send.  Note that
no initial client send is distinct from an initial send of a null string,
and the protocol MUST account for this difference.

.PP
.I clientinlen
is the length of initial response
.PP
.I serverout
is created by the plugin library. It is the initial server response to send to the client. This is allocated/freed by the library and it is the job of the client to send it over the network to the server. Also protocol specific encoding (such as base64 encoding) must needs to be done by the server.
.PP
.I serveroutlen
is set to the length of initial server challenge
.PP

.PP

.SH "RETURN VALUE"

sasl_server_start returns an integer which corresponds to one of the
SASL errorcodes. SASL_OK indicates that authentication is completed
successfully. SASL_CONTINUE indicates success and that there are
more steps needed in the authentication. All other return codes
indicate errors and should either be handled or the authentication
session should be quit.

.SH "CONFORMING TO"
RFC 4422
.SH "SEE ALSO"
sasl(3), sasl_errors(3), sasl_server_init(3), sasl_server_new(3), sasl_server_step(3)
